brew install v8@3.15 bundle config --local build.libv8 --with-system-v8 bundle config --local build.therubyracer --with-v8-dir=/usr/local/opt/v8@3.15 bundle install
brew install v8@3.15 bundle config --local build.libv8 --with-system-v8 bundle config --local build.therubyracer --with-v8-dir=/usr/local/opt/v8@3.15 bundle install